... Skin care serum Non-toxic, odorless,safe, reliable, anti-aging, eliminate free radicals and catalytic,promote metabolic,sterilization.serum:Product IntroductionThis product ... free radicals in human bodies. Product Features IndexPerfformanceAppearancePurple liquidConcentrationAu≥1000ppmPh value7.0 ... environmental protection, non-irritating to skin.Powerful sterilization, sterilization effect.To improve ...